package edu.gdkm.demo;

public class Demo3 {
    public static void main(String[] args) {
        //赋值
        int a = 1;
        System.out.println(a);
        a = 100;
        System.out.println(a);
        a = a +2;
        System.out.println(a);
        //声明   初始化
        String c = new String() ;
        System.out.println(c);
    }
}
